Cameron Clark and Niall Kearney beat Sean Dougherty and Grant Sturgeon 2 and 1 in foursomes Saturday to help Great Britain and Ireland tie the United States 8-8 in the PGA Cup.
The competition for club professionals will end Sunday at CordeValle with 10 singles matches.
"Everybody keeps saying how balanced both teams are, how great both teams are," U.S. captain Allen Wronowski said. "This is as equally as matched a game as you can have."
The U.S. leads the series 17-5-4 — and has never lost on home soil.
"Never say never," GB&I captain Jon Bevan said. "It's got to change sometime. I've got the right personalities in place and the right characters on the golf course. However, I would never, ever underestimate the opposition."
The other three afternoon foursomes matches were halved. Bob Sowards and Jamie Broce of the United States tied Gareth Wright and Jason Levermore; Americans Michael Block and Stuart Deane split with Lee Clarke and Alex Wrigley; and U.S. teammates Matt Dobyns and Ben Polland tied Graham Fox and David Dixon.
In the morning fourballs matches, Sturgeon and Alan Morin beat Michael Watson and Paul Hendriksen 4 and 2, Dougherty and Omar Uresti halved with Fox and Dixon; Wright and Levermore topped Block and Deane 3 and 2; and Kearney and Wrigley edged Dobyns and Polland 1 up.